Mexico · 1991–2020

Best time to visit
Tlalchiyahualica.

December leads for comfortable weather in Tlalchiyahualica: typically 25.7°C by day, 13.3°C at night, with 36 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortDecember

Typical high25.7°C

Typical low13.3°C

Rain in December36 mm

Comfort

December

December · January · February

89climate match

Beach

March

March · April · February

80climate match

Outdoors

January

January · December · February

74climate match

The weakest month is September, scoring 13 against December’s 89 — 320 mm of rain falls, and days average 32.5°C, 9° above the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

8725.1° / 12.5°

Feb

8526.9° / 13.6°

Mar

7430.2° / 16.4°

Apr

5533.3° / 19.3°

May

3936.1° / 22.1°

Jun

2335.8° / 22.3°

Jul

2533.9° / 21.7°

Aug

2734.3° / 21.5°

Sep

1332.5° / 21.1°

Oct

4330.9° / 18.6°

Nov

7527.9° / 15.7°

Dec

8925.7° / 13.3°

Monthly climate evidence for Tlalchiyahualica — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	25.1°C	12.5°C	45 mm	6.6	10 h 59	87	Good coverage
February	26.9°C	13.6°C	40 mm	5.1	11 h 26	85	Good coverage
March	30.2°C	16.4°C	46 mm	4.8	11 h 58	74	Good coverage
April	33.3°C	19.3°C	73 mm	4.7	12 h 36	55	Good coverage
May	36.1°C	22.1°C	83 mm	4.4	13 h 07	39	Good coverage
June	35.8°C	22.3°C	174 mm	8.7	13 h 24	23	Good coverage
July	33.9°C	21.7°C	204 mm	11.1	13 h 17	25	Good coverage
August	34.3°C	21.5°C	180 mm	10.3	12 h 51	27	Good coverage
September	32.5°C	21.1°C	320 mm	12.3	12 h 14	13	Good coverage
October	30.9°C	18.6°C	199 mm	7.9	11 h 38	43	Good coverage
November	27.9°C	15.7°C	88 mm	6.7	11 h 07	75	Good coverage
December	25.7°C	13.3°C	36 mm	5.5	10 h 52	89	Good coverage

Records at ATLAPEXCO, 1981–2011
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	37.8°C22 Jan 1999	1.7°C9 Jan 2010	69 mm1 Jan 1988	98 mm1992 · driest 14 mm in 1996	25
February	38.3°C20 Feb 1986	1.7°C4 Feb 2011	45 mm4 Feb 2007	117 mm2007 · driest 15 mm in 1998	26
March	43.3°C29 Mar 2000	5.0°C2 Mar 2009	128 mm30 Mar 1997	192 mm1997 · driest 4 mm in 1984	24
April	48.3°C16 Apr 1998	9.4°C1 Apr 2003	91 mm17 Apr 2010	198 mm2010 · driest 1 mm in 1984	26
May	47.8°C5 May 1999	13.9°C4 May 2011	122 mm14 May 2006	243 mm1984 · driest 0 mm in 1998	27
June	47.8°C5 Jun 1998	14.4°C1 Jun 2009	143 mm20 Jun 1993	603 mm1993 · driest 8 mm in 1982	27
July	40.6°C6 Jul 1998	17.2°C25 Jul 2002	171 mm6 Jul 2008	572 mm2010 · driest 23 mm in 1996	27
August	41.1°C22 Aug 1997	17.2°C17 Aug 2000	198 mm30 Aug 2009	492 mm2007 · driest 37 mm in 1985	27
September	39.4°C6 Sep 2000	15.0°C9 Sep 2011	280 mm20 Sep 1993	765 mm1984 · driest 82 mm in 1995	27
October	37.8°C18 Oct 2006	8.9°C25 Oct 2007	280 mm9 Oct 1997	385 mm1997 · driest 34 mm in 2010	27
November	38.9°C5 Nov 1988	4.4°C29 Nov 2011	131 mm17 Nov 2011	197 mm1991 · driest 5 mm in 1981	28
December	35.0°C13 Dec 1987	-2.2°C24 Dec 1989	88 mm4 Dec 1981	157 mm1981 · driest 10 mm in 2001	28

Typical days per month at ATLAPEXCO, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	18	7	1
February	20	11	1
March	27	19	1
April	28	23	2
May	31	30	2
June	29	28	5
July	31	28	6
August	31	29	5
September	28	23	7
October	28	22	5
November	23	13	3
December	20	7	<1

How often, not how much — every day in ATLAPEXCO’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	70%	21%	4%	22%	22.3–26.9°C
February	76%	20%	4%	14%	24.3–29.5°C
March	83%	16%	3%	14%	29.0–31.7°C
April	85%	16%	6%	13%	31.1–35.6°C
May	84%	16%	7%	15%	33.6–38.9°C
June	70%	30%	17%	41%	32.8–37.4°C
July	62%	38%	20%	47%	31.2–36.3°C
August	68%	32%	16%	43%	32.6–35.3°C
September	60%	40%	25%	53%	30.8–34.5°C
October	75%	25%	13%	29%	29.2–32.4°C
November	78%	21%	8%	18%	26.7–30.0°C
December	74%	20%	3%	16%	24.2–27.9°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1982Each stripe is one year’s mean temperature against the 21-year average. Warmest: 1995. Coolest: 2010.2011

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3813439
NOAA station: MXN00013135 · ATLAPEXCO
Station distance: 8.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 20.97°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from ATLAPEXCO is what differs

Santa Teresa→Atlapexco→Mecatlán→Pahactla→Tecacahuaco→Zoquitipán→

Or put two places side by side: Tlalchiyahualica vs Santa Teresa

Best time to visitTlalchiyahualica.